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單側同雙側檢定(one- and two-tailed tests)係假說檢定上嘅一個概念:單側檢定(one-tailed test)指個假說講明咗 處於 邊一面,即係 或者 ,而雙側檢定(two-tailed tests)指個假說冇講明 處於 邊一面,即係單純嘅 。
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